Attachment for typewriters



H. L. HEDRICK AND H. C. CHANTLER.

ATTACHMENT FOR TYPEWRIT EBS.

APPLICATION men NOV. 5, 1919.

Patented June 21, 1921.

2 SH.EETSSHEET l- H. L. HEDRICK AND H. C. CHANTLER.

ATTACHMENT FOR TYPEWRITERS.

APPLICATION FILED NOV.5. 1919.

1,381,920, Patented June 21, 1921.

2 SHEETSSHEET 2.

I N VEN TOR.

A TTORNEY.

h" F03 TYIEWRITEBt-Ei.

specification of Letters Patent Patented June 21, 1921.

Application flIcd'Novcmber 5, 1919. Serial No. 335,827.

Toall'whomz'tmayconcem:

Be it known that we, Harem) L. HEDRICK and HENRY C. CHANTLER, citizensof the 'United States of America, residing at Golumbus, in the county ofFranklin and State of Ohio, have invented certain new and usefulImprovements in Attachments for Typewriters, of which the followingis aspecifioation.

Our invention relates to an attachment for typewriters. It contemplatesthe provision of a device which may be apphed to a typewriter of normalform without modification thereof.

We have provided a combination of mechanism embodyin a single motorwhich is preferably opera 1e continuously, together with a'means forcarrying through the depression of a key when such depression is onceinitiated as well as a means for effecting the return of the carriageand the customary line spacing operation at proper intervals. In ourapparatus both the key depression mechanism and the carriage return areoperated manually, divi'ces being provided to'manually couple either oneor the other with the motor at any desired instant. The device whichdirectly operates the keys of the typewriter after depression is onceinitiated preferably takes the form of a corrugated roller geared andbelted to the motor while the device which operates the carriage returndesirably takes the form of a friction cord or cable that coiiperateswith a friction wheel upon the manual depression of a key provided forthis purpose to effect connection with the continuously operating motor.

An important feature of this invent1on consists in the automaticcarriage return and line spacing mechanism per 88. We have provided anextremely simple structure fitting in with the normal operation of theother parts of our apparatus whereby the depression of a key providedtherefor will result in the application of retracting power to a cordthat is so connected to the carriage of the typewriter that it willbring about the return of such carriage and the line spacing actionwhenever the retraction of said cord is effected. The preferredembodiment of our-invention is shown in'the accompanying drawingswherein similar characters of reference designate corresponding partsand wherein- Figure 1 is a front elevation of a typewmter w thourapparatus-a plied thereto.

Fig. 2 1s a detail view in Front elevation of the key. mechanism that weuse for manually bringing about the operation of the carr age returnmechanism.

Fig. 3 is an and elevation of the structure shown in Fig. 2.

Fig. 4 is a detail,- the line spacing element of the carriage returnmechanism.

Fig. 5 is a partial detail clutch utilized by us.

Fig. 6 is a section taken on line'6-6 of F1g.' 5.

In the drawings, our mechanism is shown as comprlslng a motor 1 drivinga pulley 2 which is connected by a belt to an enlarged pulley 3 thatdrives a shaft 4. At its forward end this shaft is provided with a worm5 for cooperation with a worm wheel 6 upon a counter-shaft 7. Thiscounter-shaft 7 is connected to and drives a corrugated roller 8 whichin turn coiiperates with any one of depending attachments 9 upon the keyboard of the typewriter. It will be understood that this corrugatedroller preferably operates continuously since the motor 1 is runningcontinuously-and whenever the depression of a key is initiated thecorrugated roller 8 operates upon the depending rack member 9 to carrythrough the depression. This operaof the friction 7 tion is fully setforth in our application filed September 5, 1919, Serial No. 821,772.

In the rear of the worm 5 upon the shaft 4 We have provided a wheel 10which is desirably grooved as at 11 (see Fig. 6) and the surface ofwhich groove is preferably roughened. This wheel 10 because of itspermanent connection by means of the pulley 3 and belt to thepulley 2 ofthe motor 1 is driven continuously.

The mechanism which coiiperates with the wheel 10 to bring about thereturn of the carriage and to effect line spacing at the same time isillustrated in Figs. 1, 4, 5 and 6. It comprises a yoke member 12' (seeFig. 4;) having a split collar at its upper end as at 13, which splitcollar embraces the shank of the line spacing lever and is held thereonby means of a cotter pin 14 in conjunction with partially in section, of

. a relatively wide finger-hold of this line spacing lever The lowerendof the member 12 is provided with a support as at 15 and with an interal extension 16 having aneyelet as at 17. onnected to this eyelet 17 isa cord 18 which preferably passes to the right, down over ulley 19 andaround and under a pulley 20. onnected to the cord 18 at its lower endis a supplemental cord or cable 21 passing through stop guides 22, whichguides are spaced and disposed upon either side of and immediately belowthe wheel 10. The guides 22 are supported uponan arm 23 which is pivotedas at '24 upon a standard 25 and which carries a wheel 26 dis osedimmediately below the wheel 10 and li ewise grooved as at 27. I

The free end of the arm 23 is normally held downwardly by means of acoil spring 28 and when in said lowered position the cord 21 is out ofcontact with the grooved periphery of the wheel 10, as illustrated inFigs. 1 and 6.

A means for lifting the free end of the arm 23 against the tension ofthe coil spring 28 is provided in the form ofa cord or cable 29whichpasses over-a pulley 30 and is connected to a cable 31 having a housing32 and provided with a turn buckle 33 so that its length may be adjustedto vary the operation as desired. The upper end of this cord'or cable 31is connected as shown in Fig. 2 to the work arm of a lever 34 whichcarries upon its opposite end a key button 35 desirably of substantiallysemicircular form. This lever 34 is carried upon clamp members 36 and 37which may be attached to the base of the typewriter in a manner thatwill be readily understood.

In the operation of our carriage return mechanism, the arm 35 isdepressed when the carriage reaches the end of the line with the resultthat the cord 21 will be carried upwardly by means of the roller 26 tothe dotted line position shown in Fig. 5. When this occurs, thecontinuously rotated wheel 10.takes a friction grip upon the cord andretracts it with ample force to bring about line spacing andby furtherretraction of the cord 18 to return the carriage.

'The mechanism of our device is simple and readily understood.Furthermore, it is atnaeneao tachable or, detachable without in anywaymarrin or changing the construction of the typewriter. Furthermore, itis of cheap construction and the motor utilized is given full use. Itwill be noted that the cord 21 is enlarged at its end to preventaccidental drawing through the guides 22, although the len th of thiscord is-such as to preclude this un er normal circumstances.

Having thus described our invention, what we claim is:

1. An attachment for typewriters comprising a friction drive 'wheel, acord attached .the line spacer at one end of the typewriter carriage forreturning such carriagewhen retracte and means for moving said cord intocontact with said friction wheel.

2. An attachment for t pewriters compris-' ing a friction drive whee acord attached to one end of the typewriter carriage for returning suchcarriage and line-spacing when retracted, and means for moving sa1d cordinto contact with said friction wheel.

3. An attachment for typewriters comprising a friction drive wheel,a'cord attached to one end of the typewriter carriage for returning suchcarriage and line-spacing when retracted, a movable wheel over whichsaid cord is designed to pass, a means for moving said wheel to bringsaid cord into frictional relation to said friction drive wheel. I

4. An attachment for ty ewriters comprising a friction drive wheel acord attached to one end of the typewriter for returning said carriagewhen-retracted, a wheel over which said cord passes, and'means formoving said wheel so as to force said cord against said friction drivewheel.

5. An attachment for t pewriters compris-- ing a friction drive whee acord attached to one end of the typewriter carriage for returning suchcarriage when retracted, a su port for said cord which normally holdsthe cord out of contact with said friction drive wheel, and a keyoperated mechanism for moving said support to bring said cord intooperative relation to said friction drive.

wheel.

In testimony whereof we hereby afiix our signatures.

HAROLD. L. HEDRICK. HENRY C. CHANTLER.

